4037-1370-6300
=4037-(1370+6300)
=4037-7670
=-3633 {这样基本没什么简便算法,否则可能还折腾麻烦}
如果是4037-1370-630
则原式=4037-(1370+630)=4037-2000=2037
0.45x18
=0.45*2*9
= 0.9*9
=8.1
用简便运算方法计算下面各题4037-1370-6300 0.45x18 = == =
4037-1370-6300
=4037-(1370+6300)
=4037-7670
=-3633 {这样基本没什么简便算法,否则可能还折腾麻烦}
如果是4037-1370-630
则原式=4037-(1370+630)=4037-2000=2037
0.45x18
=0.45*2*9
= 0.9*9
=8.1